Combustion chamber



Au 4, 1931; G, A, BRYAN 1,817,801

COMBUSTION CHAMBER Filed June 11, 1929 INVENTOR George A Bryan ATTORNEY Patented Aug. 4, 1931 UNITED STATES raia? Price A GEORGE A. BRYAN, or PERU, INDIANA, .ASSIGNOR- To BRY N s'inAM conronATIo A conroRATroN on ew MEXICO l COMBUSTION CHAIvIBER Application filed June 11,

This application is a continuation in part of my copending application Serial No. 141,786, filed October 15, 1926, for water heaters, and relates to combustion chambers for steam generating units.

In the construction of steam generating units of the type used in domestic heating plants, it has been the practice, in order to prevent high radiation losses from the walls of the combustion chamber, and to prevent the wall from becoming overheated and damaging material which may be in close proximity to the boiler, to form the walls of the combustion chamber so as to constitute a water leg of the boiler. In boiler design and operation, the gases resulting from the combustion of the fuel are, in general, relied upon to heat the boiler and the water contained therein. These gases move upwardly toward the crown sheet of the boiler and there is a considerable portion of the walls of the combustion chamber, especially below the fuel bed, which is only heated by radiation of heat from the fuel bed. In consequence, therefore, a considerable portion of the water in the water leg surrounding the combustion chamber is never heated to the boiling point and does not enter into circulation. This water, in time, becomes stagnant, uselessly absorbs heat, and lowers the efliciency of the boiler.

By my invention, I eliminate the above disadvantages of thedomestic steam generating unit. I accomplish my object by constructing a combustion chamber as a separate unit and embodying in the walls thereof the principles which effectively minimize heat transfer and consequently reduce radiation losses to a negligible quantity.

A detailed description of one embodiment of my invention will be given in connection with the accompanying drawings in which:

Fig. 1 is an isometric of a combustion chamber embodying my invention;

Fig. 2 is a section on the line 2-2 of Fig. 1; and

Fig. 3 is a section on the line 33 of Fig. 2.

In the illustrated embodiment, there is shown a combustion chamber of the type 1929. Serial No. 369,982.

used in an' automatically fired oil or gas burning steam generating unit of a domestic heating system. The steam generator is adaptedto rest upon and be supported by the walls of the chamber. The chamber comprises an outer wall which in this instance is constructed from four cast-Yiron plates. The front plate 1 is provided with an opening through which the oil or gas burner is adapted to be projected into the chamber. One of the side plates 2 is provided with an inspection opening having a normally closed cover 3. The walls are secured together by means of bolts 4. Each of the walls has formed on the upper edge an inwardly extending flange 5, on the lower edge, outwardly extending flanges constituting a base, and on the inner surface integral spacers or fins 6 against which an asbestos lining 7 is adapted to rest. The spacers or fins 6 positively maintain an air space between the asbestos lining and the outer wall which greatly increases the heat insulating capacity of the wall.

An inner wall 8 of fire-brick is laid against the asbestos lining 7, on the upper edge of which the inturned flange 5 of the outer walls is adapted to rest. The flanges 5 are adapted to accommodate the lower edge of the boiler which is used with the combustion chamber. By this construction, the weight of the boiler isborne by the iron plates constituting the outer wall of the combustion chamber.

It is obvious that various changes may be made in the illustrated embodiment above particularly described within the principle and scope of my invention as expressed in the appended claims.

Claims:

1. A combustion chamber adapted to cooperate with a steam generating unit comprising an inner heat refractory llnmg, a heat insulating lining in contact with the outer surface of said heat refractory lining, and an outer wall consisting of a plurality of flat metal plates secured together and having spacing cleats on their inner surfaces and an inwardly extending flange at their upper edges said flange extending over the. 100

upper edges of the heat insulating and heat refractory linings.

2. A combustion chamber adapted to co operate with a steam generating unit comprising an inner heat refractory lining, a heat insulating lining in contact with the outer surface of the heat refractory lining, and an outer wall for supporting a steam generating unit above the combustion chamber consisting of a plurality of substantially fiat metal plates secured together and having integral cleats on their inner surfaces for maintaining an air space between the plates and the heat insulating lining and flanges on their upper and lower edges, the flange at the lower edges constituting a base and the flanges at the upper edges extending inwardly over the heat insulating and heat refractory lining and constituting a support for said steam generating unit.

In witness whereof, I hereunto subscribe my signature.

GEORGE A. BRYAN. 

